Cooktop



FIG. 1 is a perspective view of a cooktop showing my new design;

FIG. 2 is a top plan view thereof; and,

FIG. 3 is a side elevation view.

The dashed broken lines are for purposes of illustrating portions of the cooktop and form no part of the claimed design. The shade lines in the figures show contour and not surface ornamentation. 

CLAIM The ornamental design for a cooktop, as shown and described. 